An observational study showed that the average four-year-old could assemble a toy in 15 seconds. the average five-year-old could assemble the same toy 40 percent faster. how many seconds did it take the average five-year-old to assemble the toy?

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

William invested $5000 in an account that earns 3.8% interest, compounded annually. the formula for compound interest is a(t) = p(1 + i)t. how much did william have in the account after 6 years? (apex)

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.